SGS Thomson Microelectronics ST72T753L6M1, ST72753L6, ST72753L5, ST72753L4, ST72753 Datasheet

April 1998 1/3

This is preliminary information on a new product in development or undergoing evaluation. Details are subject to change without noti ce.

R

ST72753

8-BIT MCU FOR MONITORS WITH UP T O 32K ROM, 1K RAM, ADC,

TIMER, SYNC, PWM/BRM, DDC/DMA & I

2

C

BRIEF DATA

■

User ROM/OTP: up to 32 Kbytes

■

Data RAM: up to 1 Kbytes (256 bytes stack)

■

8 MHz Maximum Internal Clock Frequency in
fast mode, 4 MHz in normal mode

■

Run, Wait and Halt CPU modes

■

Sync Processor for Mode Recognition, power
management and composite video blanking,
clamping and free-running frequency
generation.

– Corrector mode
– Analyzer mode

■

Fast I2C Multi Master Interface

■

DDC Bus Interface fully compliant with DDC1,
2B, 2B+, 2AB, 2Bi standards

■

18 I/O lines
– 1 high current I/O (10 mA)
– Up to 4 high voltage outputs (9V)

■

16-bit timer with 2 in put captures an d 2 output
compare functions (with 1 output pin)

■

8-bit Analog to Digital Converter with 4
channels on port B

■

8 10-bit PWM/BRM Digital to Analog outputs

■

One 12-bit PWM/BRM Digital to Analog output

■

Master Reset and Power on/off reset1

■

Programmable Watchdog for system reliability

■

34-pin Shrink Dual In line Plastic package

■

Fully static operation

■

0 to + 70 oC Operating Temperature Range

■

4.0V to 5.5V supply operating range

■

24 MHz Quartz Oscillator

■

63 basic instructions/17 main address modes

■

8x8 unsigned multiply instruction

■

True bit manipulation

■

Versatile Development Tools (DOS and
Windows) including assembler, linker, C­compiler, archiver, source level debugger,
programmer, and hardware emulator

Note 1

: Power On/Off reset not implemented in

this revision.

Device Summary

Features ST72753L6 ST72753L5 ST72753L4

ROM
(bytes)

32K 24K 16K

RAM
(bytes)

1K 768 512

ADC 4 channels
Timer 1
I

2

C Bus one multimaster
DDC/DMA yes
Sync yes
PWM 6
I/O 18
OTP

Device

ST72T752L6M1

See Ordering Information at the end of the Document

PSO34

1

2/3

ST72753

1 GENERAL DESCRIPTION

1.1 INTRODUCTION

The ST72753 is a HCMOS microcontroller unit
(MCU) from the ST7 family with dedicated periph­erals for Monitor applications.
It is based around an indu stry standard 8-bi t core
and offers an enhanced i nstruction set. The proc­essor runs with an external clock at 24 MHz with
a 5V supply. Due to the fully static de sign of this
device, operation down to DC is possible. Under
software control the ST72753 can be placed in
WAIT or HALT mode thus reducing power con­sumption. The enhanced instruction set and ad­dressing modes afford real programming potential.

In addition to standard 8-bit data management the
ST7 features true bit manipulation, 8x8 unsigned
multiplication and indirect addressing modes.

The device includes an on-chip oscillator, CPU,
Sync Processor for video timing & Vfbac k analy­sis, up to 32K ROM, up to 1K RAM, I/O, a timer
with 2 input captures and 2 o utput compares , a 4­channel Analog to Digital Converter, DDC/DMA,
I

2

C multi Master, Watchdog Re set, and six 10-bit
PWM/BRM outputs for analog DC control of exter­nal functions.

Figure 1. ST72753 Block Diagram

SYNC

PROCES SO R

POWER

SUPPLY

OSC /3 or 6

V

DD

PORT A

PORT C

P

C

L

A

D

D

R

E

S

S

/

D

A

T

A

B

U

S

E

S

DDC

TIMER

WATCHDOG

PORT D

C

S

Y

N

C

I

H

S

Y

N

C

O

V

S

Y

N

C

O

H

/

C

S

Y

N

C

V

S

Y

N

C

OCMP

C

L

A

M

P

O

U

T

PWM/BRM

PORT B

ADC

AIN 0..2, AIN7

32K Bytes

RAM

1K Bytes

CONTROL

8-BIT CORE

ALU

P

C

H

S

P

X

Y

A

C

C

INTERNAL

CLOCK

V

SS

OSCOUTOSCIN

DA1,DA6

DDC DMA

V

F

B

A

C

K

PORT C

SCLD

SDAD

I²C

S

C

L

I

S

D

A

I

PA4-PA6 (HV)

PA7/BLANKOUT

PC3/SDAD
PC2/RX/SCLD
PC0/OCMP/HFBACK

RESET

HSYNCI

VSYNCI

PB1..2/ AIN1..2

VFBACK/AIN0

PC4/SCLI

PC5/SDAI

PC6 (HC)

POWER ON/OFF

ROM/

Up to

Up to

PB0

/

PD0/CSYNCI/ITA

PD1/HSYNCO

PD2/VSYNCO

PD3/ITC

PD6/CLAMPOUT

PB7/AIN7

EPROM/OTP

H

F

B

A

C

K